Lifting mechanism for mullers of ore-grinding pans.



I- i AI .Tmw.. l l A o. A. umn.

um. mlm m 'ULI-ll l nl mi. "n

nvuunn nu a". n. un. 1,029,863. m m 'm' "ll dent ofthe cit-y and county of `@an Franl c l cisco and State of California, have invented new and useful Im iroveinents in Lifting tion.

ore grinding means for regu ating or varying the. contact of the grinding stones or mullers with the n grinding surfaces of the pan without. sluitiiiiprove in several respects thel means for grinding surfaces of the pan.

ments in the construction and arrangement and forming part of a previous invention covered by Letters Patent issued to me on the seventh day of November, 1803, no.

from and held at one end above the bottoni of the pan with a greatei according to the conditions of the work,

end of the muller; as well as to insure an I even wearing away of the grinding faces of the mullers.

i This regulating mechanism for the mullers of an ore grindin pan, consists in the novel parts and com -iination of parts as hereinafter described and set. forth in the claims at the end of this specification, reference being had to the description of the accompanying drawings:-

Figure 1 of the (.lrawings represents in vertical section an ore grinding pan having the niiiller lifting mechanism of in v inveiition embodied therein. Fi". .2 shows in def tail on an enlarged scale the muller lifting mechanism and the upright shaft of the Il driving means.

The lifting mechanism forming the subject matter of this invention is shown and will be described herein in connection willi m v earlier improvements in ore-grinding pans covered by Letters Patent before menl tioned to which they are especially applicable.

The pan or apparatus illustrated in the drawing is of that description, having the outer mullers S harnessed or attached to Mechanism for Mu lers of (`)re(`rrin.ding4 Pans, of which the following is a specificae This invention relates to improvements in l ans, and especially to the.

ting ofl the power or interrupting the grind- .g ing operation; the object beingr chiefly to.

lifting and holding thelniullcrs at varying distances and with vaiving extent or degree of contact or distance from the opposingI This invention embraces `several improvc- .i

of the regulating mechanism described inl 508,008, by which the niullers are raised.

less elevation,

and as it may be desired to vary the layer .or body of pulp taken under the leading Srevolving arms d-c fast on the upright, shaft f by which they are driiwn around l the shaft A with sufficient seed to t.hrow the outer ores in' contact wit the sides of the pan.

In the progress of the work it becomes l necessary at. times to lift the nose or forward end of the niiiller to letl the fpulp pass under in greater or less quantity rom time, to tinic-to be caught between and :ictcd on by the. grindingr -surface; and for the purpose. of raising and adjustingr its worliing position with relation lo the bottom surface of the pau each niullcr is attached to a separate lifting mechanism the construction and arrangement of which are shown in the detail Fig. 2.

l lach niiiller is connected to a slidable col- 4jlar on the upright shaft by a connection composed partly of a flexible cord or a chain and partly of a still` rod, having one end fastened in a slidable collar and extending therefrom perpendicularly downward, so that the pulling force or strain which is thrown on the rod by the upward movement of the collar will be substantially parallel with the shaft. f; the Cord being turned and carried under and over guide pulleys on the carrying arms and downward tothe. mullers so as to apply the pull of the rod perpendicularl'v.

As arranged in Fig. 1 the outer muller S Ion the right is connected with the rod 2 @through tlie medium of the lever q which is fulcrumed at /i on the arm c, and from ,j the inner end of the lever (7 the cord k is lcarried under the pulley m and up to the g rod l to which it is fastened. The niiiller 'i is attached to the outer end of the lever g t r b v a link a. 'l`he rod 2 is carried up lthrough an aperture in the first, or lowest collar l0 to the next collar 9 in which it is .fastened rigidly hy nuts on the screwthreadcd end of the rod. Each niiiller is connected in like manner separately with a 'l collar by a stili rod fastened rigidly at the l'top end in its collar, and by the cord or itlexible connection between the lower end ofthe rod and the niiiller; the rods that are fastened to the upper collars being cai'ricd pcrpendicularly upward through the lower collars, which nrc aperturcd foi' that. plirpose. 'l`lie collars are raised and lowered by t means: of hand-levers y having forked ends Icn'5a; "ing the collars. and the levers aie held 5in any desired position within the limits of the. machine by a rack w so arranged as to engage the levers ucar the ends. .ny muller or scraper l0 in the pan is readily raised oi' lowered by o ierating the particui, lar hand-lever with wliich it' is connected ltln-ough a sliding collar and connections. 'l`lic vertical movement being limited in the downward direction by the stop collars lil fastened to the shaft. prevents the collars from being moved on the shaft to such u f tending downward therefrom pnrnllel with point tliiitl the cord connection would 'bcf-,ome loose and be linble to be nnshipped trom the cnrrying ulle s. The stop collnrs 14 secured to tic s aft by set screws 12.lim'it....the...uowiird movement of the colliii's 7, 8, il, 10 nnd regulate the length of movement. lt is evident thnl :is theI niullers niiil sei'npers lt wenr down it will not be ueressniv to move the eollnrs .so greet n distziuee to riiise, the operntive pnrts tlic dewiird movement of the rod into n lifting j sired distzinee from the bottoni ol' the pnn.v 'l`lie connection between the seriipers lt nnil uiiilleis niid the eollnrs 7, 8, t) and 10 nre so :irriinged tluit nn upwnrd movement of the eolliirs will cniise im upwiird inovenient of the opernting pnrts,thereby plncing the connections in tension iis they nre being regulnted. This nlloivs of the use of much lighter connecting pnrts tluin when such' pnrts'werc subject to compression during their operation.

In this improvement it will be seen thnttlie connect-ions between the ndpistinglevers and the mullers or parts to lie moved nre miule in sneli n straight or direct inzinner, tlintf they will work withoutbinding or excessive friction, nud the pnrts`cnn be set or adjusted by the exercise of n relatively sinnll exertion of power.

I clniin:-

1. In iin ore grinding-prin hnving trnveling iniillers arranged for movement nround iin upright driving-shnft, the eoinbinntion willi the mullers, of n plurality of slidnble F eollnrs on the sluift hnving limited vcrticiil f movement thereon, one over iinotlier, ii rod to eneli collnr extending vertieiilly down-` wnrd therefrom, n flexible connection lie-I tween the lower end of ench rnd :ind one of the niiillers, guide-pulleys nrrnnged to ceri-5l the connection muller, the rods connected to the upper collnrs being cnrried loosely tlironfli tlie eol- 1 liii's below in n direction generiily pziriillel with the slinft, fixed stops on the sluift for C limiting the movement of the eollnrs, iind menus nttnehed to eneh eollnr for moving the snnie und thereby rnisng or lowering the inullers.

.2. ln n grinding-pun of the elinincter dest'ribed hnving nn upright driving `slmft, n pluriility of mullei's nrriinged to trnvel on the bottom of the nin iiround the drivingshuft from which t icy receive their motion, of menns for regnlnting llie eonlnet of the inullers with the bottom of tlie pnn, coinprisiiig n pluriility of slidnlile. eollnrs on the sluift pliieed one nbove iinotlier, ndjilslnlile stops between the collniis for reguhiting their extent of movement, n connecting ineens between eiieh collnr iind n piirticuliir eolliii' composed iii'tly of n still' rod niiil pnrtly of n tlexibile connection, the rod being nttiielied directly to its eollnr nnd exfrom the said rod to the' the shaft through nll the colliirs below, sind guide pulleys nrrnn ed between the lower i end of the rod and t e muller for cari ing the flexible connection in proper wor m2 position to transform the perpendicular upftl nllers. immmwnt O 1(gilrilS'IAVE A. (HCLICN. t Witnesses: i ll. ll. Osiiniiis',

M. Ricorsi-tn. 

